User blog comment:Biggren/The Northern March/@comment-3135907-20130319210814/@comment-3135907-20130402200825

OOC: This, like most of my RPGs, is some generations after the events of The Rogue Crew take place (my RPGs all take place in order from WotC, twenty seasons after The Rogue Crew, to this one, which is about a hundred and fifty seasons after that book). No books mention the absence of other tunnels, or any mandates barring the creation of new tunnels, so I think I can create ones that could have been dug later on.

The lock is wrought of a heavy iron cast, thick and impregnable to the dirk handle. The good thing about it is, in its antique design it possesses a large, simple keyhole and locking mechanism, easy to pick if one had some skills in that art and a lockpicking tool.